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l. E. STAHL, E. S. BENJAMIN, A. B. GRIFFITH AND R. LOFFLAND.

STAVE MoLp. APPLICATION FILED APR. l2, l 9l7.

Patented Dc.16,1919.

UNITED srarn s PATENT oFFIoEQ JAMES E. STAHL, ELMER S. BENJAMIN, ALBERT B. GRIFFITH, AND ROY LOFFLAND, OF

WOB'IHINGTON, INDIANA, ASSIGNORS TO CEMENTPRODUCTS COMPANY, OF WORTH- INGTON, INDIANA, A CORPORATION OF INDIANA.

STAVE-MOLD.

Application filed April 12, 1917.

To all whom it may concern.-

Be it known that we, JAMES E. STAHL, ELMER S. BENJAMIN, ALBERT B. GRIFFITH, and ROY LOFFLAND, citizens of the United States, residing at \Vorthington, in the county of Greene and State of Indiana, have invented certain new and useful Improvements in Stave-Molds, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in molds for forming cement staves used in constructing stave silos as disclosed in our companion application of even date herewith. Serial No. 161,599, the object being to provide a mold by means of which a series of staves can be formed, each stave having one longitudinal edge convened and the opposite edge concaved, the end edges being provided with substantially semicircular shaped grooves so that when a series of these staves are assembled to produce a structure such as a silo, a series of communicating grooves will be formed which are adapted to be filled with liquid cement for sealing the staves.

Another object of our invention is to pro vide a mold in which the pallet is in the form of a tray having sides and open ends between which a eries of mold strips are arranged so as to form partitions, the end pieces being interlocked with the partitions so as to produce a mold in which the stave can be formed having a semi-circular recess around three of its edges.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claim.

In the d 'awings,

Figure 1 is a perspective view of a mold constructed in accordance with our invention showing the same in position upon a j g Fig. 2 Fig. 1;

Fig. 3 is a section taken on line 33 of Fig. 1; and

Fig. at is a detail perspective view of a portion of one of the side and end pieces of the mold.

Like numeral of reference refer to like parts in the several figures of the drawin In carrying out our invention we employ is a section taken on line 22 of Specification of Letters Patent.

Serial No. 161,600.

a rectangular open ended tray 1 which is adapted to be arranged on the frame of an Patented Dec. 16,1919.

ordinary jogger. Arranged within thetray is a series of transversely arranged parti tions 3 forming the side pieces of the mold which are preferably substantially semi-circular in cros section having a convexed face a and a concaved face 5, the concaved face being provided with a longitudinally disposed rib 6 substantially semi-circular in cross section which terminates short of the ends of the partitions.

The convexed face 4 terminates at shoulders 7 so as to produce a square ecge on the concaved face of the stave formed. Arranged between the partitions formed by the side pieces of the mold are end pieces 8 which are curved as shown at 9 at one end adapted to fit within the concaved face of the side piece and are cut away on an arc of a circle at the opposite end as shown at .10 in which the conveXed face of the abutting side piece is adapted to extend. The end. pieces 8 are provided with longitudinally disposed rib-s 11 substantially semicircular in cross section, the end of the rib at the curved end of the side piece being cut away on the arc of a circle as shown at 12 and are adapted to receive the rib 6 of the side pieces so as to form a joint which will produce a stave having a semi-circular groove formed in three of its edges.

The side piece or partitions of the mold at the end of a tray are held in position by retaining members 13 when a series of molds are arranged within the tray as shown in Fig. 1. A series of staves can be formed at one time, each stave having along one of its side edges a conveXed face provided with a longitudinally disposed groove, and along i s opposite side edge with a concaved face, the ends of the staves thus formed being provided with longitudinally disposed grooves.

While we have showna mold constructed to form 'staves, it is of course, understood that in building a silo it is necessary to form door frames, but as the door frames are constructed in substantially the same manner as taves it can be readily seen that the mold pieces can be utilized for forming the door frames.

We claim:

A mold for forming cement staves comprising an open ended tray, a series of removable partitions arranged transversely within said tray and spaced apart by removable end pieces said partitions being substantially semi-circular in shape in cross section to produce upon one longitudinal edge of the stave a convexed face, and upon the other longitudinal edge a concaved face, the concaved face of said partitions being provided with longitudinally disposed ribs substantially semi-circular in cross section and terminating short of the ends thereof, the ends of the end pieces conforming to the shape of the faces of the respective partitions, and having longitudinal ribs substantially semi-circular in shape in cross section provided with semi-circular recesses to receive the ribs of the partition, and retaining members arranged at the ends of the tray adapted to engage the partitions for holding said partitions and end pieces in assembled position within said tray.

In testimony whereof we hereunto aflix our signatures in the presence of two witnesses.

JAMES E. STA-HL. ELMER S. BENJAMIN. ALBERT B. GRIFFITH. ROY LOFFLAND. lVitnesses RoBT. F. VVEEMS, EMsLEY lVADswoRTH. 

